1601066550 has 48 divisors (see below), whose sum is σ = 3981263040. Its totient is φ = 425809440.

The previous prime is 1601066549. The next prime is 1601066581. The reversal of 1601066550 is 556601061.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42769 + ... + 70931.

It is an arithmetic number, because the mean of its divisors is an integer number (82942980).

Almost surely, 2^1601066550 is an apocalyptic number.

1601066550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601066550 is an abundant number, since it is smaller than the sum of its proper divisors (2380196490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601066550 is a wasteful number, since it uses less digits than its factorization.

1601066550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28557 (or 28552 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1601066550 is about 40013.3296540041. The cubic root of 1601066550 is about 1169.8669218207.

The spelling of 1601066550 in words is "one billion, six hundred one million, sixty-six thousand, five hundred fifty".